I have exited from the manhole to go to the upper level rotating passage. I have followed MaG's WT but when I climb the final ladder the opening is closed with a grill across it. I think I may have gone wrong after the coloured dots puzzle.

Nanjoan, after the coloured dots puzzle, according to MaG WT, did you turn around and press the red button to slide the door on the right. This opens the passage from under the moon room to the passage going to the chest via the ladder behind the rotationg passage?

Edit: I have backtracked and come out of the manhole again. Can you give me some idea which map to use to get to the upper rotating passage. I printed off MaG's maps to get them larger so I can follow them more easily.

Go to the lower rotating passage.Cross to the other side. Press the red button and climb the ladder.If there's a grill, press that red button again to turn the room to get another ladder.You are turning the turntable above.Then climb again. See, if that works.

These numbers under the elevator are clues to open one of the door at the blue domed room.

Note that the elevator clue is in 4 squares. Each of the squares has 2 numbers.Go to the panel with similar 4 squares at the blue domed room.Press the squares in the order given by the clue - press the one that has #1, then #2, then #3 etc..... Like top right square, bottom right....

Oh dear I am stuck again. I am in the glass maze and have reached the door where the button is in the middle (B), I have been trying for ages to reach the room (O) but get massively lost. I seem to be going round and round in circles and keep arriving at (H).

I cannot believe I am stuck again. I have arrived back at the decorated hall. I have opened the door to the riveted metal panels. I clicked on the red button which opened fine. Same with the green button. BUT the blue one won't open.

I have a feeling that somewhere I have missed something but I don't know what.